Mapping gradient-driven morphological phase transition at the conductive domain walls of strained multiferroic films

doi:10.1103/PhysRevB.100.104109

IMR OpenIR

	Mapping gradient-driven morphological phase transition at the conductive domain walls of strained multiferroic films
	Han, M. J.1,2; Eliseev, E. A.3; Morozovska, A. N.4; Zhu, Y. L.1; Tang, Y. L.1; Wang, Y. J.1; Guo, X. W.1,5; Ma, X. L.1,6
通讯作者	Morozovska, A. N.(anna.n.morozovska@gmail.com)
	2019-09-11
发表期刊	PHYSICAL REVIEW B
ISSN	2469-9950
卷号	100 期号:10 页码:14
摘要	The coupling between antiferrodistortion (AFD) and ferroelectric (FE) polarization, universal for all tilted perovskite multiferroics, is known to strongly correlate with domain wall functionalities in the materials. The intrinsic mechanisms of domain wall phenomena, especially AFD-FE coupling-induced phenomena at the domain walls, have continued to intrigue the scientific and technological communities because of the need to develop future nanoscale electronic devices. Over the past years, theoretical studies have often shown controversial results, owing to the fact that they are neither sufficiently nor directly corroborated with experimental evidence. In this work, the AFD-FE coupling at uncharged 180 degrees and 71 degrees domain walls in BiFeO3 films is investigated by means of aberration-corrected scanning transmission electron microscopy with high-resolution scanning transmission electron microscopy and rationalized by phenomenological Landau-Ginzburg-Devonshire (LGD) theory. We reveal a peculiar morphology at the AFD-FE walls, including kinks, meandering, and trianglelike regions with opposite oxygen displacements and curvature near the interface. The LGD theory confirms that the tilt gradient energy induces these unusual morphologies and the features would change delicately with different kinds of domain walls. Moreover, the 180 degrees AFD-FE walls are proved to be conductive with an unexpected reduction of the Fe-O-Fe bond angle, which is distinct from theoretical predictions. By exploring AFD-FE coupling at the domain walls, and its induced functionalities, we provide exciting evidence into the links between structural distortions and its electronic properties, which provide great benefit for fundamental understanding of domain wall functionalities as well as functional manipulations for novel nanodevices.
资助者	Key Research Program of Frontier Sciences CAS ; National Natural Science Foundation of China ; National Basic Research Program of China ; IMR SYNL-T.S. Ke Research Fellowship ; Youth Innovation Promotion Association CAS ; National Academy of Sciences of Ukraine ; European Union
DOI	10.1103/PhysRevB.100.104109
收录类别	SCI
语种	英语
资助项目	Key Research Program of Frontier Sciences CAS[QYZDJ-SSW-JSC010] ; National Natural Science Foundation of China[51671194] ; National Natural Science Foundation of China[51571197] ; National Basic Research Program of China[2014CB921002] ; IMR SYNL-T.S. Ke Research Fellowship ; Youth Innovation Promotion Association CAS[2016177] ; National Academy of Sciences of Ukraine[0117U002612] ; European Union[778070]
WOS研究方向	Materials Science ; Physics
WOS类目	Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:000485191700001
出版者	AMER PHYSICAL SOC
引用统计	被引频次：21[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/135432
专题	中国科学院金属研究所
通讯作者	Morozovska, A. N.
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Wenhua Rd 72, Shenyang 110016, Liaoning, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Natl Acad Sci Ukraine, Inst Problems Mat Sci, Krjijanovskogo 3, UA-03142 Kiev, Ukraine 4.Natl Acad Sci Ukraine, Inst Phys, 46 Prospekt Nauky, UA-03028 Kiev, Ukraine 5.Univ Sci & Technol China, Jinzhai Rd 96, Hefei 230026, Anhui, Peoples R China 6.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Langongping Rd 287, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Han, M. J.,Eliseev, E. A.,Morozovska, A. N.,et al. Mapping gradient-driven morphological phase transition at the conductive domain walls of strained multiferroic films[J]. PHYSICAL REVIEW B,2019,100(10):14.
APA	Han, M. J..,Eliseev, E. A..,Morozovska, A. N..,Zhu, Y. L..,Tang, Y. L..,...&Ma, X. L..(2019).Mapping gradient-driven morphological phase transition at the conductive domain walls of strained multiferroic films.PHYSICAL REVIEW B,100(10),14.
MLA	Han, M. J.,et al."Mapping gradient-driven morphological phase transition at the conductive domain walls of strained multiferroic films".PHYSICAL REVIEW B 100.10(2019):14.